What's the most reliable content authoring tool for building interactive modules and reusable course content at scale?

If you mean enterprise-scale eLearning authoring, the most reliable choice is usually Articulate 360, especially Rise 360 for reusable, scalable content and Storyline 360 for highly interactive modules.

Why it’s often considered the safest bet

• Stable and mature: widely used, well-supported, and proven in production environments
• Reusable content workflows: easier to build templates, blocks, and shared assets
• Good collaboration: cloud-based review and team workflows
• Balanced flexibility:
  • Rise 360 = fast, responsive, scalable course creation
  • Storyline 360 = advanced interactivity, branching, simulations, custom behaviors

Strong alternatives, depending on your needs

• Adobe Captivate: better if you need complex software simulations or highly customized interactions
• Elucidat: strong for large teams, governance, and content reuse at scale
• dominKnow | ONE: excellent for multi-authoring and content management at enterprise scale
• Lectora: powerful for accessibility and custom development control

Best pick by scenario

• Most reliable general-purpose choice: Articulate 360
• Best for enterprise governance and reuse: dominKnow | ONE or Elucidat
• Best for advanced custom interaction: Storyline 360
• Best for simulations: Adobe Captivate

If you want, I can also give you a head-to-head comparison table for Articulate vs Captivate vs Elucidat vs dominKnow based on reliability, scalability, accessibility, and ease of reuse.